Features: Achieve accurate measurements with our precisions steel rule marking block, crafted from high strength metal for superior durability and scratch resistant performances. This compact metal ruler features an integrated sliding mechanism and locking clamp that securely holds position at your desired measurement point for consistent, accurate markings every time. Ideal for woodworkers, DIYer enthusiasts, and professional craftsmen needing dependable precisions tool for detailed project work. Effortlessly straight cutting lines on lumber, drywalls, or metal sheets in workshops, construction, or home garages. Experience effortless measuring and marking with clearly 0.1mm graduation markings and the convenient sliding lock function on this essential steel rule accessory. Specifications: Component:Aluminum Alloy + Brass Ruler: 330mm/12.99''x25.2mm/0.98''x0.9mm/0.35'' Limit block: 15.5mm/0.61''x75mm/2.95''x29mm/1.14'' Type:with Steel Ruler,without Steel Ruler Package Includes: 1Set Steel Ruler + Positioning Block or 1Piece Positioning Block note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.